In the world of transmission, the sector of bevel gear occupies a special place.
In this article we want to give an overview of bevel gears, in particular spiral bevel gears; to establish solid foundations in order to allow a better understanding of referrals.
Within a pair of gears, with a ratio different from 1: 1, the pinion is defined as the gear with the fewest number of teeth and crowns the gear with the greatest number of teeth.
The conical wheels perform the function of distributing the motion, usually at 90 °, but it is possible to distribute the motion even with different angles.
Bevel gears are divided into several types; the first distinguishing factor is the type of teeth: